China is by far the largest auto market in the world, and sales are rising quickly. In all, Chinese consumers bought nearly 24 million vehicles last year, up from about 16 million just six years ago, according to the data providers Euromonitor and JATO.

GM(GM) sales in particular are on a record run there. The company delivered 3.4 million cars in China in the first 11 months of the year, up 8.5% from the same period last year. GM sells more cars to Chinese consumers than Americans.

GM declined comment on the Bloomberg News report. The company said only that it respects local laws everywhere it operates.

GM is not the only American automaker that has a lot at stake in China. Ford(F) sales there have also been on fire. Ford and its Chinese partners have sold more than 1 million vehicles in 2016. Ford sales were up 17% in November compared with last year.